14 results about "Thermoplastic polyurethane" patented technology

The invention belongs to the technical field of polymer preparation, and especially relates to a preparation method of a thermoplastic polyurethane elastomer. The method comprises the following steps: 1, putting 1,4-cyclohexyl diisocyanate, polyethylene glycol adipate, 1,4-butylene glycol, a lubricant and a hydrolysis resistance agent in a blender, fully stirring, and fully plastifying in a high-temperature plastifying machine or a high-temperature internal mixer to obtain a thermoplastic polyurethane elastomer matrix; 2, processing an inorganic nanofiller by a silane coupling agent to obtain an modified inorganic nanofiller; and 3, dissolving the thermoplastic polyurethane elastomer matrix in tetrahydrofuran, adding the modified inorganic nanofiller, mechanically stirring, removing tetrahydrofuran, and carrying out film forming to obtain the thermoplastic polyurethane elastomer. Compared with the prior art, the method provided by the invention can effectively increase the heat resistance, the mechanical performances and the ageing resistance of the polyurethane elastomer on the premise that the comprehensive performances of the thermoplastic polyurethane elastomer do not decrease.

A protective jaw pad for a sports helmet having a shell with at least one side area for covering at least part of the jaw of a wearer, the jaw pad including a first resilient shock absorbing member of thermoplastic polyurethane, the first member having a sheet portion with multiple hollow protrusions, tapering side walls of the protrusions extending substantially to an inside surface of the side area of the shell and being compressible for absorbing shocks applied to the shell. The pad includes a second resilient shock absorbing member. A plastic cover is removably attached to the first resilient shock absorbing member, and encases the second shock absorbing member. The plastic cover and the first shock-absorbing member are releasably attached by a hook and loop fastener. The first shock absorbing member has multiple slots for receiving a T-nut at a variety of locations therealong.

The invention discloses a method for preparing high-resilience thermoplastic polyurethane foamed particles and a molded body thereof. Thermoplastic polyurethane particles are placed in an autoclave, injected high-pressure mixed fluid is one or two of CO2, N2, HFC and HCFC, one or two of chloroform, ethanol, methanol, acetone, anone, butanone, pyridine, N-methyl pyrrolidone, N,N-dimethylformamide and N,N-dimethyl acetamide serve as an organic cosolvent, and the high-pressure mixed fluid is enabled to be in a saturated state in the thermoplastic polyurethane particles and then is placed in hot air for foaming, thereby obtaining the thermoplastic polyurethane foamed particles, of which foamed pore structures are uniform and are closed-pore structures. The thermoplastic polyurethane foamed particle molded body, which is light in weight, high in resilience and controllable in shape size and has good mechanical properties, can be obtained through injecting the thermoplastic polyurethane foamed particles in a mold and adjusting mold pressing temperature and pressure so as to soften heated surfaces of the foamed particles.

The invention provides a novel halogen-free flame retardant composite material. The novel halogen-free flame retardant composite material comprises the following components in percentage by weight: 28% to 64.5% of polypropylene, 10% to 20% of thermoplastic polyurethane elastomer, 5% to 10% of bulking agent, 15% to 25% of halogen-free flame retardant agent, 5% to 15% of flame retardant synergist, and 0.5% to 2% of coupling agent, wherein the total percentage of the components by weight is 100%. The invention also aims at providing a preparation method of the novel halogen-free flame retardant composite material. The novel halogen-free flame retardant composite material has the advantages that the preparation technology is simple, the mechanical property is good, the high temperature-resistant property and flame-retardant property are realized, the efficiency is high, the clean and environment-friendly effects are realized, and the novel halogen-free flame retardant composite material can be widely applied to the fields of automobiles, household parts and accessories, wires and cables, and the like.

The invention discloses an antibacterial and hydrolysis-resistant thermoplastic polyurethane elastomer and a preparation method of the polyurethane elastomer, and belongs to the field of high molecular materials. The polyurethane elastomer is prepared from the following raw materials by mass percentage: 40-70% of hydroxyl-terminated polyhydric alcohol, 20-40% of diisocyanate, 4-15% of micromolecular dihydric alcohol chain extender, 1-5% of hydrolysis stabilizer, 0.1-0.5% of antioxidant, 0.1-0.5% of light stabilizer, 0.1-0.5% of mildewproof agent, 0.5-1% of lubricant and 0.001-0.005% of catalyst. The mildewproof agent is added, so that the antibacterial property of the polyurethane elastomer is improved, and the service life of the polyurethane elastomer is prolonged; the hydrolysis stabilizer is added, so that the problem of degradation of the polyurethane elastomer in a hygrothermal environment is solved; and compared with current commonly used disc method and casting method technologies, a product synthetized by the polyurethane elastomer has the characteristics of stable extrusion, uniform molecular weight and few colloidal crystal point.

The invention relates to the technical field of chain teeth and in particular relates to a transparent flashing polyester chain tooth, a preparation method and a zip fastener. The transparent flashingpolyester chain tooth is prepared from PET (Polyethylene Terephthalate), TPU (Thermoplastic Polyurethane) modified master batch, a lubricant, an antioxidant and an ultraviolet absorbent, wherein theTPU modified master batch is prepared from isocyanate, polyol, a chain extender, a crosslinking agent and flashing powder; the flashing powder is composed of a micron-grade prism pyramid monomer polyacrylamide layer. According to the transparent flashing polyester chain tooth, the TPU modified master batch with relatively good toughness is added into a PET material, so that the transparent flashing polyester chain tooth has good toughness and anti-impact performance; furthermore, the surface of a micron-grade prism pyramid monomer is covered with the polyacrylamide layer and the crosslinking agent participates, so that the micron-grade prism pyramid monomer is uniformly dispersed in the PET material; compared with a manner of directly adding the micron-grade prism pyramid monomer or the flashing powder into the PET material, the transparent flashing polyester chain tooth has a more uniform and bright flashing property.

The invention discloses coloring TPU (thermoplastic polyurethane elastomer) foamed beads as well as a preparation method and application thereof. The coloring TPU foamed beams comprise: (1) TPU foamedbeads; and (2) a color paste-containing water-based polyurethane solution, wherein the surfaces of the TPU foamed beads are spray-coated with the color paste-containing water-based polyurethane solution; the surfaces of the TPU foamed beads are subjected to cleaning degreasing and low-temperature plasma activating treatment through ultrasonic wave; and the water-based polyurethane solution comprises water-based polyurethane, water-based color paste, a water-based antioxidant, a light stabilizer for the water-based polyurethane, a crosslinking agent and deionized water. The coloring TPU foamedbeams are uniform in surface pigment, and are green and environmentally-friendly.

The invention relates to the technical field of hot melt adhesive preparation, and discloses a hot melt adhesive sheet. The hot melt adhesive sheet comprises the following components by weight: 45-55%of thermoplastic polyurethane elastomer rubber and 30-35% of ethylene-vinyl acetate copolymer rubber. The hot melt adhesive sheet has the following advantages and effects: the thermoplastic polyurethane elastomer rubber is mainly used for increasing elasticity and viscosity of the material; the ethylene-vinyl acetate copolymer rubber is used for improving bending resistance of the material so asto improve toughness of the material. Therefore, the thermoplastic polyurethane elastomer rubber and the ethylene-vinyl acetate copolymer rubber are mixed to obtain the hot melt adhesive sheet with better elasticity, so that shoes can be automatically recovered after deformation, and wearing of the shoes is prevented from being influenced; and on the other hand, the thermoplastic polyurethane elastomer rubber and the ethylene-vinyl acetate copolymer rubber are blended, so that the hot melt adhesive has more excellent toughness and hardness, and comprehensive performance of the material can beimproved.

The invention provides a novel particle for fishing gear box production and a preparation method thereof, and relates to the technical field of fishing gear box production raw materials. The novel particle for fishing gear box production is prepared from the following raw materials in parts by weight: 40-50 parts of ethylene vinyl acetate copolymer, 10-20 parts of polyethylene, 10-20 parts of polypropylene, 10-20 parts of thermoplastic polyurethane elastomer rubber, 8-12 parts of thermoplastic vulcanized rubber, 8-10 parts of nitrile rubber, 3-5 parts of ethylene bis oleamide, 0.2-0.4 part of flame retardant, 0.5-0.9 part of light stabilizer, 1-2 parts of glass fiber, 1-2 parts of titanium dioxide, 1-2 parts of a lubricant and 1-2 parts of a dispersant. According to the invention, the fishing gear box is produced by the prepared granular material, and the physical properties of the fishing gear box are obviously improved so that the quality of the fishing gear box is greatly improved, the strength of the fishing gear box is still enough after the fishing gear box is used for a long time, and the product is not easy to age.

Thermoplastic articles are molded from thermoplastic polyurethane compounds including blends of aliphatic poly-caprolactone thermoplastic polyurethane and aromatic thermoplastic polyurethane selected from aromatic polyester thermoplastic polyurethane, aromatic polyether thermoplastic polyurethane, and combinations thereof. The thermoplastic articles exhibit enhanced stain resistance, as represented by achieving a rating of 2 or better according to Blue Jean Abrasion Test, relative to thermoplastic articles molded from thermoplastic polyurethane compounds including either aromatic polyester thermoplastic polyurethane or aromatic polyether thermoplastic only, while also having good clarity (i.e., low haze) and other desirable properties. The thermoplastic articles can be especially useful as protective cases for handheld electronic devices.

The invention discloses a thermoplastic polyurethane elastomer processing device which comprises a tank. A heating cavity is arranged in an inner cavity of the tank; heating columns are arranged between the left side wall and the right side wall of an inner cavity of the heating cavity at equal intervals; a feed inlet is formed in the left side of the top part of the tank; a stirring motor is arranged in the middle of the top part of the tank; a stirring shaft is arranged at a bottom power output end of the stirring motor; the bottom part of the stirring shaft stretches into the inner cavity of the heating cavity; stirring blades are arranged at one end, stretching into the heating cavity, of the stirring shaft at equal intervals; an air outlet is formed in the right side of the top part of the tank; a cooling fan is arranged in an inner cavity of the air outlet; a discharging pipe is arranged on the bottom part of the tank; the heating cavity communicates to the top part of the discharging pipe; and support pillars are arranged on the left side and the right side of the bottom part of the tank. According to the thermoplastic polyurethane elastomer processing device provided by theinvention, a thermoplastic polyurethane elastomer can be stirred and heated through the heating columns in the tank during the heating and drying process so as to be uniformly heated in the tank, sothat a better drying effect is ensured.

The invention relates to an antibacterial medical fabric which comprises a base layer (2) and an antibacterial layer (1). Warp yarns (11) and weft yarns (12) are mutually connected to form the antibacterial layer (1), nano silver fibers are woven to form the warp yarns (11) and the weft yarns (12), the base layer is made of fabrics sequentially including an isolated layer, a first protective layer, a second protective layer and a bottom layer from top to bottom, the isolated layer is made of thermoplastic polyurethane films, the first protective layer is made of polypropylene fiber fabrics, the second protective layer is made of polytetrafluoroethylene films, and the bottom layer is made of weft knitting fabrics and warp knitting fabrics with natural fibers, synthetic fibers and regenerated fibers. The antibacterial medical fabric has a fine antibacterial effect and various functions such as blood seepage prevention, water resistance, antibacterial performance and moisture permeability, and harm of bacteria to human bodies is decreased.

The invention discloses a bonding process between a metal base material and a glass base material, which comprises the following steps: coating the surface of the metal base material with a layer of polymer coating, coating the surface of the glass base material with a layer of ink coating, and placing a glue film between the metal base material and the glass base material, and the adhesive film is respectively combined with the polymer coating and the ink coating. According to the bonding process between the metal base material and the glass base material, hydroxyl, carboxyl and isocyanato which are contained on a main chain of thermoplastic polyurethane resin in the adhesive film respectively react with a polymer coating on the surface of the metal base material and an ink coating on the surface of the glass base material; the binding force between the adhesive film and the metal base material and the binding force between the adhesive film and the glass base material are respectively enhanced, so that the connecting strength between the metal base material and the glass base material is improved.